Freestyle Anyone running 38 blackjacks?

pigpen

pigpen

Location
kalispell
Just curious if anyone is running blackjack 38's? I just picked up a set and I'm curious what people are running for jetting. Couldn't find anything other then OEM 38's on the jetting database. Engine is a 62t/61x 781bb, ported, b pipe, 180psi, vf2's, lightweight flywheel, stock ignition.

Current jetting is-
19psi pop off
2.0 n/s
Shiny spring
Main 127.5
Pilot 72.5
Riding at 5200ft


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ajmps1

ajmps1

Location
Pa
McDog said:
Call Art at Jetworks/blackjack performance. And on a side note I didn't know blackjack 38's even existed.
Click to expand...
I think he just started offering or at least advertising the service. Taper bores and modifies your 38s, cuts that big blob out of the throat. Seems like a nice cheap fuel sipping upgrade for a "smaller" motor
 
pigpen

pigpen

Location
kalispell
305fe395ba7a0f9a62c31f2c108c43e2.jpg


OEM vs my blackjacks


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whitca

whitca

Location
Tri-Cities, WA
Art's taperbore mod 38's have been around awhile. Awesome carbs, had a set that hit better than retail 44's on identical engines. Sipped fuel too in comparison.
 
pigpen

pigpen

Location
kalispell
whitca said:
Art's taperbore mod 38's have been around awhile. Awesome carbs, had a set that hit better than retail 44's on identical engines. Sipped fuel too in comparison.
Click to expand...

That's what I'm hoping for since I'm only running a kart tank. Should be a nice upgrade from the oems.


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